Kleer wireless technology has shown promise in terms of both energy efficiency and sound quality when compared to Bluetooth, which is why some may find these new MX W1 earphones from Sennheiser appealing. The device allows users to enjoy clear, completely wireless audio from any Kleer-based portable player — unlike Kleer's Jet Stream earphones that are connected with a small wire. There is even a feature that allows multiple MX W1 users to share a single stream. There are no details on pricing yet, but they are expected to arrive in May 2008. Full press release after the break: